William lawrence



(No Mo'del.) 1 lK' W. LAWRENCE.

GAR. BRAKE MEGHANISM.- 110.517,871. i Patented Apr. 10,1894.

Q 5 o O v Q v@ f w @.NN

UNITED STATES PATENT OFFICE.

WILLIAM LAWRENCE, oF NEW YORK, N. Y., AssIGNoR lTo THE LAWRENCE ELECTRICCOMPANY, E SAME PLACE.

CAR-BRAKE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 517,871, dated April10, 1894.

Original application filed January 21. v1893, Serial No. 459,134.Divided and this application iiled August 2, 1893- Serial No.

482,157. (No model.)

.To all whom it may concern-.-

Be it known that I, WILLIAM LAWRENCE, a citizen of the United States,residing at New York, in the county and State of New York,

have inventedcertain new anduseful Irnprovements in Brake Mechanism, ofwhich the following is a full, clear, and exact specification.

This application is a division of my former 1o application, Serial No.459,134, filed January 2l, 1893, and the object of my invention is toprovide an improved brake mechanism, especially adapted for use onelectric and other cars, and the invention consists in the novel detailsof improvement and the combinations'.

of parts that will be more fully hereinafter set forth, and then pointedout in the claims.

Reference is to be had to the accompanying drawings forming part hereof,wherein- 2o Figure 1 is a plan view of my improved brake mechanism. Fig.2 is a side elevation thereof. Fig. 3 is a central longitudinal sectionof the drum and shoulder showing clearly the socket and tapered end ofthe drum.

z 5 In the drawings, the numeral 1 indicates a suitable shaft oraxlehaving a shoulder 2. One face of this shoulder is preferablysocketed and receives a tapered end of adrum or sleeve 3 fitted to slideon shaft or `axle 1, this 3o drum and shoulder thus forming a frictionclutch. The shaft 1, can freely rotate Within the drum or sleeve 3 whenthe latter is not pressed against the shoulder 2.

4 is a ring or shoulder on shaft 1, said ring having a groove 5 on itsouter surface, said ring being placed contiguous to the drum 3. Theforked end 6 of a lever 7 enters the groove 5 in ring 4, said leverbeing pivotally secured on a plate or support 8 suitably carried by a 4ocar body or truck (not shown). The lever 7 is provided at or near itsouter or opposite end with an inclined shoulder or extension 9, whichshoulder 9 is adapted to engage or bear on a wheel or projection 10,carried byfa sliding bar 11, guided in keepers 12 on plate 8.

The sliding bar 11 is connected with an arm or crank 13, on a shaft 14,suitably carried b v a car frame or truck (not shown). 15 is a rodextending longitudinally of the car and piv- 5o otally connected by anarm or crank 16 with rock shaft 14. The ends of rod 15 are pivotallyconnected with leveis17, pivoted at 18 to the platform 19, or othersuitable partsof a car body. It will be seen that the said sliding bar11 can be moved in either direction 5 5 without changing the movement ofthe lever at either end of the car.

From the foregoing it will be understood that when the rod 15 is movedlongitudinally the shaft 14 will be rocked, thereby actuating the crank13 and sliding bar 11, whereby the Wheel or projection 10 will` bebrought into engagement with the incline 9 on lever 7, causing saidlever to be moved outwardly, when the forked end 6 will be movedinwardly, 65 pressing the drum or sleeve 3 toward the shoulder 2, andcausing the tapered end of Said drum to engage in the socket or shoulder2, thus acting as a friction clutch to cause the drum ,8 to turn withshaft 1.

A chain, or its equivalent, 20, is attached at one end to the drum orsleeve 3, and at its other end is suitably connected with any desiredbrake shoe mechanism. When the tapered end of the drum or sleeve 3 isbrought 75 into contact with the socket in shoulder 2, as before stated,the chain 2O will be wound around and upon said drum, which will serveto draw the other end of said .chain to apply the brake shoes to thewheels (not shown).

The bar 11 and wheel 10 could be dispensed with and the lever 7connected by a chain 21 with the usual brake lever of an ordinary car.

Having now described my invention, what I claim, and desire to secure byLetters Patent is- 1. An improved brake mechanism consisting of a drumslidably and rotatably mounted on a shaft, a recessed shoulder mountedupon and secured to said shaft, the said drum having one end tapered andadapted to engage with the recess in said shoulder; a ring also mountedon the shaft and adapted to bear against the drum, the said ring havinga groove on its outer surface to receive the forked end of a lever, thesaid lever being pivoted on a plate and having an inclined shoulder forengagementwith a wheel mounted in a slidable bar, the said lever adaptedto be moved laterally by said wheel and bar, 10

thereby causing a friction between the drum and shoulder, substantiallyas and for the purpose set forth.

2. In a brake mechanism, the combination of a shaft, a clutch thereon, alever to operate said clutch, a sliding bar, means between said leverand said bar for moving the former by the latter, a brake and connectionbetween said brake and said clutch, for operating th latter,substantially as described.

3. In a brake mechanism the combination of a shaft, a clutch thereon, alever to operate said clutch, a sliding bar, and means between saidlever and said sliding bar for moving the former by the latter, said barmovable in either direction from either end of the car without changingthe movement of the oper ating lever, substantially as shown anddescribed.

In testimony that I claim the foregoing I have hereunto set my hand this25th day of July, 1893.

WILLIAM LAWRENCE. Witnesses:

MARK M. DECKER, JULIUS HINDFELL.

